of/irq: Fix OF node refcount in of_msi_get_domain()

In of_msi_get_domain() if the iterator loop stops early because an
irq_domain match is detected, an of_node_put() on the iterator node is
needed to keep the OF node refcount in sync.

Add it.

Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Cc: Rob Herring <robh@kernel.org>
Link: https://patch.msgid.link/20251021124103.198419-3-lpieralisi@kernel.org
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

Author: Lorenzo Pieralisi

drivers/of/irq.c

@@ -774,8 +774,10 @@ struct irq_domain *of_msi_get_domain(struct device *dev,
 
 	of_for_each_phandle(&it, err, np, "msi-parent", "#msi-cells", 0) {
 		d = irq_find_matching_host(it.node, token);
-		if (d)
+		if (d) {
+			of_node_put(it.node);
 			return d;
+		}
 	}
 
 	return NULL;